T. which takes account of the carbon emissions incurred in the growing and harvesting of the crop, including land-clearance, its processing and the CO2 that results from final combustion of the fuel.

FORBES: Land Use Changes Are Main Factor In Carbon Emissions From Biofuels

It is, first, an account of the many ways in which people have sought to produce energy by burning fossil fuels, harvesting the wind, brewing biodiesel and trapping the sun's heat.

ECONOMIST: Energy